A power management device of a wireless communication assembly receives respective signals indicative of respective voltage supply levels required by respective hardware devices among a plurality of hardware devices of the wireless communication assembly, where the respective required voltage supply levels vary over time. The power management device selects a voltage supply level corresponding to a maximum voltage supply level indicated by the respective received signals, adjusts, based on the selected supply voltage level, a supply voltage supplied to the wireless communication assembly so that the selected voltage supply level is supplied to all of the hardware devices of the wireless communication assembly.